Much to say about nothing
The discovery of vacuum was strangely pivotal in the history of science and technology. From steam engines to electronics, we talk about the power of nothing.
Here’s a video of the chain fountain in action.
Here’s a site, including a couple of videos, that attempts to explain how the chain fountain works.
Here’s a site on the history of the vacuum pump.
And here’s a page on the invention of the steam engine.